SQLite

      break;
  }
}
#else
# define fts5CheckTransactionState(x,y,z)
#endif

/*
** Return true if pTab is a contentless table.
*/
static int fts5IsContentless(Fts5Table *pTab){
  return pTab->pConfig->eContent==FTS5_CONTENT_NONE;
}

/*
** Close a virtual table handle opened by fts5InitVtab(). If the bDestroy
** argument is non-zero, attempt delete the shadow tables from teh database
*/
static int fts5FreeVtab(Fts5Table *pTab, int bDestroy){
  int rc = SQLITE_OK;

          }
        }
      }
    }else{
      /* This is either a full-table scan (ePlan==FTS5_PLAN_SCAN) or a lookup
      ** by rowid (ePlan==FTS5_PLAN_ROWID).  */
      int eStmt = fts5StmtType(idxNum);
      rc = sqlite3Fts5StorageStmt(
          pTab->pStorage, eStmt, &pCsr->pStmt, &pTab->base.zErrMsg
      );
      if( rc==SQLITE_OK ){
        if( ePlan==FTS5_PLAN_ROWID ){
          sqlite3_bind_value(pCsr->pStmt, 1, apVal[0]);
        }
        rc = fts5NextMethod(pCursor);
      }
    }

static int fts5SeekCursor(Fts5Cursor *pCsr){
  int rc = SQLITE_OK;

  /* If the cursor does not yet have a statement handle, obtain one now. */ 
  if( pCsr->pStmt==0 ){
    Fts5Table *pTab = (Fts5Table*)(pCsr->base.pVtab);
    int eStmt = fts5StmtType(pCsr->idxNum);
    rc = sqlite3Fts5StorageStmt(
        pTab->pStorage, eStmt, &pCsr->pStmt, &pTab->base.zErrMsg
    );
    assert( CsrFlagTest(pCsr, FTS5CSR_REQUIRE_CONTENT) );
  }

  if( rc==SQLITE_OK && CsrFlagTest(pCsr, FTS5CSR_REQUIRE_CONTENT) ){
    assert( pCsr->pExpr );
    sqlite3_reset(pCsr->pStmt);
    sqlite3_bind_int64(pCsr->pStmt, 1, fts5CursorRowid(pCsr));

  **   1. The "old" rowid, or NULL.
  **   2. The "new" rowid.
  **   3. Values for each of the nCol matchable columns.
  **   4. Values for the two hidden columns (<tablename> and "rank").
  */
  assert( nArg==1 || nArg==(2 + pConfig->nCol + 2) );













  eType0 = sqlite3_value_type(apVal[0]);
  eConflict = sqlite3_vtab_on_conflict(pConfig->db);

  assert( eType0==SQLITE_INTEGER || eType0==SQLITE_NULL );
  assert( pVtab->zErrMsg==0 );

  if( rc==SQLITE_OK && eType0==SQLITE_INTEGER ){
    if( fts5IsContentless(pTab) ){
      pTab->base.zErrMsg = sqlite3_mprintf(
          "cannot %s contentless fts5 table: %s", 
          (nArg>1 ? "UPDATE" : "DELETE from"), pConfig->zName
      );
      rc = SQLITE_ERROR;
    }else{
      i64 iDel = sqlite3_value_int64(apVal[0]);  /* Rowid to delete */
      rc = sqlite3Fts5StorageDelete(pTab->pStorage, iDel);
    }
  }else if( nArg>1 ){
    sqlite3_value *pCmd = apVal[2 + pConfig->nCol];
    if( SQLITE_NULL!=sqlite3_value_type(pCmd) ){
      const char *z = sqlite3_value_text(pCmd);
      if( pConfig->eContent!=FTS5_CONTENT_NORMAL 
       && 0==sqlite3_stricmp("delete", z) 
      ){
        return fts5SpecialDelete(pTab, apVal, pRowid);
      }else{
        return fts5SpecialInsert(pTab, pCmd, apVal[2 + pConfig->nCol + 1]);
      }
    }
  }


  if( rc==SQLITE_OK && nArg>1 ){
    rc = sqlite3Fts5StorageInsert(pTab->pStorage, apVal, eConflict, pRowid);
  }

  return rc;
}

static int fts5ApiColumnText(
  Fts5Context *pCtx, 
  int iCol, 
  const char **pz, 
  int *pn
){
  int rc = SQLITE_OK;
  Fts5Cursor *pCsr = (Fts5Cursor*)pCtx;
  if( fts5IsContentless((Fts5Table*)(pCsr->base.pVtab)) ){
    *pz = 0;
    *pn = 0;
  }else{
    rc = fts5SeekCursor(pCsr);
    if( rc==SQLITE_OK ){
      *pz = (const char*)sqlite3_column_text(pCsr->pStmt, iCol+1);
      *pn = sqlite3_column_bytes(pCsr->pStmt, iCol+1);
    }
  }
  return rc;
}

static int fts5ApiColumnSize(Fts5Context *pCtx, int iCol, int *pnToken){
  Fts5Cursor *pCsr = (Fts5Cursor*)pCtx;
  Fts5Table *pTab = (Fts5Table*)(pCsr->base.pVtab);

** the row that the supplied cursor currently points to.
*/
static int fts5ColumnMethod(
  sqlite3_vtab_cursor *pCursor,   /* Cursor to retrieve value from */
  sqlite3_context *pCtx,          /* Context for sqlite3_result_xxx() calls */
  int iCol                        /* Index of column to read value from */
){
  Fts5Table *pTab = (Fts5Table*)(pCursor->pVtab);
  Fts5Config *pConfig = pTab->pConfig;
  Fts5Cursor *pCsr = (Fts5Cursor*)pCursor;
  int rc = SQLITE_OK;
  
  assert( CsrFlagTest(pCsr, FTS5CSR_EOF)==0 );

  if( pCsr->idxNum==FTS5_PLAN_SPECIAL ){
    if( iCol==pConfig->nCol ){

        FTS5_PLAN(pCsr->idxNum)==FTS5_PLAN_MATCH
     || FTS5_PLAN(pCsr->idxNum)==FTS5_PLAN_SORTED_MATCH
    ){
      if( pCsr->pRank || SQLITE_OK==(rc = fts5FindRankFunction(pCsr)) ){
        fts5ApiInvoke(pCsr->pRank, pCsr, pCtx, pCsr->nRankArg, pCsr->apRankArg);
      }
    }
  }else if( !fts5IsContentless(pTab) ){
    rc = fts5SeekCursor(pCsr);
    if( rc==SQLITE_OK ){
      sqlite3_result_value(pCtx, sqlite3_column_value(pCsr->pStmt, iCol+1));
    }
  }
  return rc;
}

  sqlite3 *db;                    /* Database handle */
  char *zDb;                      /* Database holding FTS index (e.g. "main") */
  char *zName;                    /* Name of FTS index */
  int nCol;                       /* Number of columns */
  char **azCol;                   /* Column names */
  int nPrefix;                    /* Number of prefix indexes */
  int *aPrefix;                   /* Sizes in bytes of nPrefix prefix indexes */
  int eContent;                   /* An FTS5_CONTENT value */
  char *zContent;                 /* content table */ 
  char *zContentRowid;            /* "content_rowid=" option value */ 
  Fts5Tokenizer *pTok;
  fts5_tokenizer *pTokApi;

  /* Values loaded from the %_config table */
  int iCookie;                    /* Incremented when %_config is modified */
  int pgsz;                       /* Approximate page size used in %_data */
  int nAutomerge;                 /* 'automerge' setting */
  char *zRank;                    /* Name of rank function */
  char *zRankArgs;                /* Arguments to rank function */
};

#define FTS5_CONTENT_NORMAL   0
#define FTS5_CONTENT_NONE     1
#define FTS5_CONTENT_EXTERNAL 2



int sqlite3Fts5ConfigParse(
    Fts5Global*, sqlite3*, int, const char **, Fts5Config**, char**
);
void sqlite3Fts5ConfigFree(Fts5Config*);

int sqlite3Fts5ConfigDeclareVtab(Fts5Config *pConfig);

int sqlite3Fts5CreateTable(Fts5Config*, const char*, const char*, int, char **);

int sqlite3Fts5StorageDelete(Fts5Storage *p, i64);
int sqlite3Fts5StorageInsert(Fts5Storage *p, sqlite3_value **apVal, int, i64*);

int sqlite3Fts5StorageIntegrity(Fts5Storage *p);

int sqlite3Fts5StorageStmt(Fts5Storage *p, int eStmt, sqlite3_stmt**, char**);
void sqlite3Fts5StorageStmtRelease(Fts5Storage *p, int eStmt, sqlite3_stmt*);

int sqlite3Fts5StorageDocsize(Fts5Storage *p, i64 iRowid, int *aCol);
int sqlite3Fts5StorageSize(Fts5Storage *p, int iCol, i64 *pnAvg);
int sqlite3Fts5StorageRowCount(Fts5Storage *p, i64 *pnRow);

int sqlite3Fts5StorageSync(Fts5Storage *p, int bCommit);

  iCol = sqlite3_value_int(apVal[0]);
  memset(&ctx, 0, sizeof(HighlightContext));
  ctx.zOpen = (const char*)sqlite3_value_text(apVal[1]);
  ctx.zClose = (const char*)sqlite3_value_text(apVal[2]);
  rc = pApi->xColumnText(pFts, iCol, &ctx.zIn, &ctx.nIn);

  if( ctx.zIn ){
    if( rc==SQLITE_OK ){
      rc = fts5CInstIterInit(pApi, pFts, iCol, &ctx.iter);
    }

    if( rc==SQLITE_OK ){
      rc = pApi->xTokenize(pFts, ctx.zIn, ctx.nIn, (void*)&ctx,fts5HighlightCb);
    }
    fts5HighlightAppend(&rc, &ctx, &ctx.zIn[ctx.iOff], ctx.nIn - ctx.iOff);

    if( rc==SQLITE_OK ){
      sqlite3_result_text(pCtx, (const char*)ctx.zOut, -1, SQLITE_TRANSIENT);
    }else{
      sqlite3_result_error_code(pCtx, rc);
    }
    sqlite3_free(ctx.zOut);
  }
}
/*
** End of highlight() implementation.
**************************************************************************/

/*
** Implementation of snippet() function.

    const char *zErr = "wrong number of arguments to function snippet()";
    sqlite3_result_error(pCtx, zErr, -1);
    return;
  }

  memset(&ctx, 0, sizeof(HighlightContext));
  iCol = sqlite3_value_int(apVal[0]);

  ctx.zOpen = (const char*)sqlite3_value_text(apVal[1]);
  ctx.zClose = (const char*)sqlite3_value_text(apVal[2]);
  zEllips = (const char*)sqlite3_value_text(apVal[3]);
  nToken = sqlite3_value_int(apVal[4]);
  iBestLast = nToken-1;

  iBestCol = (iCol>=0 ? iCol : 0);

  if( rc==SQLITE_OK ){
    rc = pApi->xColumnSize(pFts, iBestCol, &nColSize);
  }
  if( rc==SQLITE_OK ){
    rc = pApi->xColumnText(pFts, iBestCol, &ctx.zIn, &ctx.nIn);
  }
  if( ctx.zIn ){
    if( rc==SQLITE_OK ){
      rc = fts5CInstIterInit(pApi, pFts, iBestCol, &ctx.iter);
    }

    if( (iBestStart+nToken-1)>iBestLast ){
      iBestStart -= (iBestStart+nToken-1-iBestLast) / 2;
    }
    if( iBestStart+nToken>nColSize ){
      iBestStart = nColSize - nToken;
    }
    if( iBestStart<0 ) iBestStart = 0;

    ctx.iRangeStart = iBestStart;
    ctx.iRangeEnd = iBestStart + nToken - 1;

    if( iBestStart>0 ){
      fts5HighlightAppend(&rc, &ctx, zEllips, -1);
    }
    if( rc==SQLITE_OK ){
      rc = pApi->xTokenize(pFts, ctx.zIn, ctx.nIn, (void*)&ctx,fts5HighlightCb);
    }
    if( ctx.iRangeEnd>=(nColSize-1) ){
      fts5HighlightAppend(&rc, &ctx, &ctx.zIn[ctx.iOff], ctx.nIn - ctx.iOff);
    }else{
      fts5HighlightAppend(&rc, &ctx, zEllips, -1);
    }

    if( rc==SQLITE_OK ){
      sqlite3_result_text(pCtx, (const char*)ctx.zOut, -1, SQLITE_TRANSIENT);
    }else{
      sqlite3_result_error_code(pCtx, rc);
    }
    sqlite3_free(ctx.zOut);
  }
  sqlite3_free(aSeen);
}

/************************************************************************/

/*
** The first time the bm25() function is called for a query, an instance

    sqlite3_free(azArg);
    sqlite3_free(pDel);
    return rc;
  }

  if( sqlite3_strnicmp("content", zCmd, nCmd)==0 ){
    int rc = SQLITE_OK;
    if( pConfig->eContent!=FTS5_CONTENT_NORMAL ){
      *pzErr = sqlite3_mprintf("multiple content=... directives");
      rc = SQLITE_ERROR;
    }else{
      if( zArg[0] ){
        pConfig->eContent = FTS5_CONTENT_EXTERNAL;
        pConfig->zContent = sqlite3_mprintf("%Q.%Q", pConfig->zDb, zArg);
      }else{
        pConfig->eContent = FTS5_CONTENT_NONE;
        pConfig->zContent = sqlite3_mprintf(
            "%Q.'%q_docsize'", pConfig->zDb, pConfig->zName
        );
      }
      if( pConfig->zContent==0 ) rc = SQLITE_NOMEM;
    }
    return rc;
  }

  if( sqlite3_strnicmp("content_rowid", zCmd, nCmd)==0 ){
    int rc = SQLITE_OK;

  ** already been allocated. Otherwise, allocate an instance of the default
  ** tokenizer (simple) now.  */
  if( rc==SQLITE_OK && pRet->pTok==0 ){
    rc = fts5ConfigDefaultTokenizer(pGlobal, pRet);
  }

  /* If no zContent option was specified, fill in the default values. */
  if( rc==SQLITE_OK && pRet->eContent==FTS5_CONTENT_NORMAL ){
    pRet->zContent = sqlite3_mprintf("%Q.'%q_content'", pRet->zDb, pRet->zName);
    if( pRet->zContent==0 ){
      rc = SQLITE_NOMEM;
    }else{
      sqlite3_free(pRet->zContentRowid);
      pRet->zContentRowid = 0;
    }

** Fts5Storage.pInsertDocsize - if they have not already been prepared.
** Return SQLITE_OK if successful, or an SQLite error code if an error
** occurs.
*/
static int fts5StorageGetStmt(
  Fts5Storage *p,                 /* Storage handle */
  int eStmt,                      /* FTS5_STMT_XXX constant */
  sqlite3_stmt **ppStmt,          /* OUT: Prepared statement handle */
  char **pzErrMsg                 /* OUT: Error message (if any) */
){
  int rc = SQLITE_OK;

  assert( eStmt>=0 && eStmt<ArraySize(p->aStmt) );
  if( p->aStmt[eStmt]==0 ){
    const char *azStmt[] = {
      "SELECT * FROM %s ORDER BY id ASC",               /* SCAN_ASC */

    }

    if( zSql==0 ){
      rc = SQLITE_NOMEM;
    }else{
      rc = sqlite3_prepare_v2(pC->db, zSql, -1, &p->aStmt[eStmt], 0);
      sqlite3_free(zSql);
      if( rc!=SQLITE_OK && pzErrMsg ){
        *pzErrMsg = sqlite3_mprintf("%s", sqlite3_errmsg(pC->db));
      }
    }
  }

  *ppStmt = p->aStmt[eStmt];
  return rc;
}

  memset(p, 0, nByte);
  p->aTotalSize = (i64*)&p[1];
  p->pConfig = pConfig;
  p->pIndex = pIndex;

  if( bCreate ){
    if( pConfig->eContent==FTS5_CONTENT_NORMAL ){
      char *zDefn = sqlite3_malloc(32 + pConfig->nCol * 10);
      if( zDefn==0 ){
        rc = SQLITE_NOMEM;
      }else{
        int i;
        int iOff = sprintf(zDefn, "id INTEGER PRIMARY KEY");
        for(i=0; i<pConfig->nCol; i++){

    /* Finalize all SQL statements */
    for(i=0; i<ArraySize(p->aStmt); i++){
      sqlite3_finalize(p->aStmt[i]);
    }

    /* If required, remove the shadow tables from the database */
    if( bDestroy ){
      if( p->pConfig->eContent==FTS5_CONTENT_NORMAL ){
        rc = sqlite3Fts5DropTable(p->pConfig, "content");
      }
      if( rc==SQLITE_OK ) rc = sqlite3Fts5DropTable(p->pConfig, "docsize");
      if( rc==SQLITE_OK ) rc = sqlite3Fts5DropTable(p->pConfig, "config");
    }

    sqlite3_free(p);
  }
  return rc;

** remove the %_content row at this time though.
*/
static int fts5StorageDeleteFromIndex(Fts5Storage *p, i64 iDel){
  Fts5Config *pConfig = p->pConfig;
  sqlite3_stmt *pSeek;            /* SELECT to read row iDel from %_data */
  int rc;                         /* Return code */

  rc = fts5StorageGetStmt(p, FTS5_STMT_LOOKUP, &pSeek, 0);
  if( rc==SQLITE_OK ){
    int rc2;
    sqlite3_bind_int64(pSeek, 1, iDel);
    if( sqlite3_step(pSeek)==SQLITE_ROW ){
      int iCol;
      Fts5InsertCtx ctx;
      ctx.pStorage = p;

*/
static int fts5StorageInsertDocsize(
  Fts5Storage *p,                 /* Storage module to write to */
  i64 iRowid,                     /* id value */
  Fts5Buffer *pBuf                /* sz value */
){
  sqlite3_stmt *pReplace = 0;
  int rc = fts5StorageGetStmt(p, FTS5_STMT_REPLACE_DOCSIZE, &pReplace, 0);
  if( rc==SQLITE_OK ){
    sqlite3_bind_int64(pReplace, 1, iRowid);
    sqlite3_bind_blob(pReplace, 2, pBuf->p, pBuf->n, SQLITE_STATIC);
    sqlite3_step(pReplace);
    rc = sqlite3_reset(pReplace);
  }
  return rc;

  /* Delete the index records */
  if( rc==SQLITE_OK ){
    rc = fts5StorageDeleteFromIndex(p, iDel);
  }

  /* Delete the %_docsize record */
  if( rc==SQLITE_OK ){
    rc = fts5StorageGetStmt(p, FTS5_STMT_DELETE_DOCSIZE, &pDel, 0);
  }
  if( rc==SQLITE_OK ){
    sqlite3_bind_int64(pDel, 1, iDel);
    sqlite3_step(pDel);
    rc = sqlite3_reset(pDel);
  }

  /* Delete the %_content record */
  if( rc==SQLITE_OK ){
    rc = fts5StorageGetStmt(p, FTS5_STMT_DELETE_CONTENT, &pDel, 0);
  }
  if( rc==SQLITE_OK ){
    sqlite3_bind_int64(pDel, 1, iDel);
    sqlite3_step(pDel);
    rc = sqlite3_reset(pDel);
  }

  i64 iDel, 
  sqlite3_value **apVal
){
  Fts5Config *pConfig = p->pConfig;
  int rc;
  sqlite3_stmt *pDel;

  assert( p->pConfig->eContent!=FTS5_CONTENT_NORMAL );
  rc = fts5StorageLoadTotals(p, 1);

  /* Delete the index records */
  if( rc==SQLITE_OK ){
    int iCol;
    Fts5InsertCtx ctx;
    ctx.pStorage = p;
    ctx.iCol = -1;

    rc = sqlite3Fts5IndexBeginWrite(p->pIndex, iDel);
    for(iCol=0; rc==SQLITE_OK && iCol<pConfig->nCol; iCol++){
      rc = sqlite3Fts5Tokenize(pConfig, 
        (const char*)sqlite3_value_text(apVal[iCol]),
        sqlite3_value_bytes(apVal[iCol]),
        (void*)&ctx,
        fts5StorageInsertCallback
      );
      p->aTotalSize[iCol] -= (i64)ctx.szCol;
    }
    p->nTotalRow--;
  }

  /* Delete the %_docsize record */
  if( rc==SQLITE_OK ){
    rc = fts5StorageGetStmt(p, FTS5_STMT_DELETE_DOCSIZE, &pDel, 0);
  }
  if( rc==SQLITE_OK ){
    sqlite3_bind_int64(pDel, 1, iDel);
    sqlite3_step(pDel);
    rc = sqlite3_reset(pDel);
  }

** Allocate a new rowid. This is used for "external content" tables when
** a NULL value is inserted into the rowid column. The new rowid is allocated
** by inserting a dummy row into the %_docsize table. The dummy will be
** overwritten later.
*/
static int fts5StorageNewRowid(Fts5Storage *p, i64 *piRowid){
  sqlite3_stmt *pReplace = 0;
  int rc = fts5StorageGetStmt(p, FTS5_STMT_REPLACE_DOCSIZE, &pReplace, 0);
  if( rc==SQLITE_OK ){
    sqlite3_bind_null(pReplace, 1);
    sqlite3_bind_null(pReplace, 2);
    sqlite3_step(pReplace);
    rc = sqlite3_reset(pReplace);
  }
  if( rc==SQLITE_OK ){

  Fts5InsertCtx ctx;              /* Tokenization callback context object */
  Fts5Buffer buf;                 /* Buffer used to build up %_docsize blob */

  memset(&buf, 0, sizeof(Fts5Buffer));
  rc = fts5StorageLoadTotals(p, 1);

  /* Insert the new row into the %_content table. */
  if( rc==SQLITE_OK ){
    if( pConfig->eContent!=FTS5_CONTENT_NORMAL ){
      if( sqlite3_value_type(apVal[1])==SQLITE_INTEGER ){
        *piRowid = sqlite3_value_int64(apVal[1]);
      }else{
        rc = fts5StorageNewRowid(p, piRowid);
      }
    }else{
      if( eConflict==SQLITE_REPLACE ){
        eStmt = FTS5_STMT_REPLACE_CONTENT;
        if( sqlite3_value_type(apVal[1])==SQLITE_INTEGER ){
          rc = fts5StorageDeleteFromIndex(p, sqlite3_value_int64(apVal[1]));
        }
      }else{
        eStmt = FTS5_STMT_INSERT_CONTENT;
      }
      if( rc==SQLITE_OK ){
        rc = fts5StorageGetStmt(p, eStmt, &pInsert, 0);
      }
      for(i=1; rc==SQLITE_OK && i<=pConfig->nCol+1; i++){
        rc = sqlite3_bind_value(pInsert, i, apVal[i]);
      }
      if( rc==SQLITE_OK ){
        sqlite3_step(pInsert);
        rc = sqlite3_reset(pInsert);

  aTotalSize = (i64*)sqlite3_malloc(pConfig->nCol * (sizeof(int)+sizeof(i64)));
  if( !aTotalSize ) return SQLITE_NOMEM;
  aColSize = (int*)&aTotalSize[pConfig->nCol];
  memset(aTotalSize, 0, sizeof(i64) * pConfig->nCol);

  /* Generate the expected index checksum based on the contents of the
  ** %_content table. This block stores the checksum in ctx.cksum. */
  rc = fts5StorageGetStmt(p, FTS5_STMT_SCAN_ASC, &pScan, 0);
  if( rc==SQLITE_OK ){
    int rc2;
    while( SQLITE_ROW==sqlite3_step(pScan) ){
      int i;
      ctx.iRowid = sqlite3_column_int64(pScan, 0);
      ctx.szCol = 0;
      rc = sqlite3Fts5StorageDocsize(p, ctx.iRowid, aColSize);

  return rc;
}

/*
** Obtain an SQLite statement handle that may be used to read data from the
** %_content table.
*/
int sqlite3Fts5StorageStmt(
  Fts5Storage *p, 
  int eStmt, 
  sqlite3_stmt **pp, 
  char **pzErrMsg
){
  int rc;
  assert( eStmt==FTS5_STMT_SCAN_ASC 
       || eStmt==FTS5_STMT_SCAN_DESC
       || eStmt==FTS5_STMT_LOOKUP
  );
  rc = fts5StorageGetStmt(p, eStmt, pp, pzErrMsg);
  if( rc==SQLITE_OK ){
    assert( p->aStmt[eStmt]==*pp );
    p->aStmt[eStmt] = 0;
  }
  return rc;
}

**
** An SQLite error code is returned if an error occurs, or SQLITE_OK
** otherwise.
*/
int sqlite3Fts5StorageDocsize(Fts5Storage *p, i64 iRowid, int *aCol){
  int nCol = p->pConfig->nCol;
  sqlite3_stmt *pLookup = 0;
  int rc = fts5StorageGetStmt(p, FTS5_STMT_LOOKUP_DOCSIZE, &pLookup, 0);
  if( rc==SQLITE_OK ){
    int bCorrupt = 1;
    sqlite3_bind_int64(pLookup, 1, iRowid);
    if( SQLITE_ROW==sqlite3_step(pLookup) ){
      const u8 *aBlob = sqlite3_column_blob(pLookup, 0);
      int nBlob = sqlite3_column_bytes(pLookup, 0);
      if( 0==fts5StorageDecodeSizeArray(aCol, nCol, aBlob, nBlob) ){

int sqlite3Fts5StorageConfigValue(
  Fts5Storage *p, 
  const char *z, 
  sqlite3_value *pVal
){
  sqlite3_stmt *pReplace = 0;
  int rc = fts5StorageGetStmt(p, FTS5_STMT_REPLACE_CONFIG, &pReplace, 0);
  if( rc==SQLITE_OK ){
    sqlite3_bind_text(pReplace, 1, z, -1, SQLITE_TRANSIENT);
    sqlite3_bind_value(pReplace, 2, pVal);
    sqlite3_step(pReplace);
    rc = sqlite3_reset(pReplace);
  }
  if( rc==SQLITE_OK ){

# 2014 Dec 20
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
#
#

if {![info exists testdir]} {
  set testdir [file join [file dirname [info script]] .. .. .. test]
}
source $testdir/tester.tcl
set testprefix fts5content

do_execsql_test 1.1 {
  CREATE VIRTUAL TABLE f1 USING fts5(a, b, content='');
  INSERT INTO f1(rowid, a, b) VALUES(1, 'one',   'o n e');
  INSERT INTO f1(rowid, a, b) VALUES(2, 'two',   't w o');
  INSERT INTO f1(rowid, a, b) VALUES(3, 'three', 't h r e e');
}

do_execsql_test 1.2 {
  SELECT rowid FROM f1 WHERE f1 MATCH 'o';
} {2 1}

do_execsql_test 1.3 {
  INSERT INTO f1(a, b) VALUES('four',   'f o u r');
  SELECT rowid FROM f1 WHERE f1 MATCH 'o';
} {4 2 1}

do_execsql_test 1.4 {
  SELECT rowid, a, b FROM f1 WHERE f1 MATCH 'o';
} {4 {} {} 2 {} {} 1 {} {}}

do_execsql_test 1.5 {
  SELECT rowid, highlight(f1, 0, '[', ']') FROM f1 WHERE f1 MATCH 'o';
} {4 {} 2 {} 1 {}}

do_execsql_test 1.6 {
  SELECT rowid, highlight(f1, 0, '[', ']') IS NULL FROM f1 WHERE f1 MATCH 'o';
} {4 1 2 1 1 1}

do_execsql_test 1.7 {
  SELECT rowid, snippet(f1, -1, '[', ']', '...', 5) IS NULL 
  FROM f1 WHERE f1 MATCH 'o';
} {4 1 2 1 1 1}

do_execsql_test 1.8 {
  SELECT rowid, snippet(f1, 1, '[', ']', '...', 5) IS NULL 
  FROM f1 WHERE f1 MATCH 'o';
} {4 1 2 1 1 1}

do_execsql_test 1.9 {
  SELECT rowid FROM f1;
} {4 3 2 1}

do_execsql_test 1.10 {
  SELECT * FROM f1;
} {{} {}  {} {}  {} {}  {} {}}

do_execsql_test 1.11 {
  SELECT rowid, a, b FROM f1 ORDER BY rowid ASC;
} {1 {} {}  2 {} {}  3 {} {}  4 {} {}}

do_execsql_test 1.12 {
  SELECT a IS NULL FROM f1;
} {1 1 1 1}

do_catchsql_test 1.13 {
  DELETE FROM f1 WHERE rowid = 2;
} {1 {cannot DELETE from contentless fts5 table: f1}}

do_catchsql_test 1.14 {
  UPDATE f1 SET a = 'a b c' WHERE rowid = 2;
} {1 {cannot UPDATE contentless fts5 table: f1}}

do_execsql_test 1.15 {
  INSERT INTO f1(f1, rowid, a, b) VALUES('delete', 2, 'two', 't w o');
} {}

db eval { SELECT fts5_decode(id, block) AS d FROM f1_data } { puts $d }

breakpoint
do_execsql_test 1.16 {
  SELECT rowid FROM f1 WHERE f1 MATCH 'o';
} {4 1}
do_execsql_test 1.17 {
  SELECT rowid FROM f1;
} {4 3 1}




finish_test